That’s a convenient excuse to cherry-pick Croft.
Willis 05 and Betzner simply do not have the resolution to depict the bottom edge of the jacket collar on the nape.
The photo above does. So we can't say Willis/Betzner shows the bunch gone and the jacket collar now visible. All I see is that the top of the jacket remained high. Which is consistent with the Croft photo having a bunch that obscures the jacket collar line from most angles. Possible there was some major wardrobe malfunction in the 1.3 sec between Croft and Betzner. A lot of things are possible. But some are more likely than others.
We’ll have to disagree about Towner.
Seems Towner shows jacket material at the nape behind the collar. As the right shoulder was elevated, the bunch probably got bigger as it went to the President's right.